{"product_id":"bigbattery-nexus-eg4-6000xp-off-grid-kit-15-kwh-48v-lifepo4","title":"BigBattery NEXUS + EG4 6000XP Off-Grid Kit | 15 kWh | 48V LiFePO4","description":"\u003cp\u003eThe BigBattery NEXUS + EG4 6000XP Off-Grid Kit pairs a 15 kWh NEXUS 48V LiFePO4 battery with the EG4 6000XP all-in-one off-grid inverter — a matched, closed-loop power system for cabins, tiny homes, workshops, and off-grid residences. The 6000XP combines a 6,000W split-phase inverter, dual MPPT solar charge controllers, and a battery charger in a single wall-mounted unit, so one enclosure handles solar input, battery charging, and 120\/240V AC output.\u003c\/p\u003e\n\n\u003ch2\u003eWhat's in this kit\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × BigBattery NEXUS 48V LiFePO4 battery\u003c\/strong\u003e — 15 kWh usable energy storage in a floor-standing cabinet with an integrated battery management system (BMS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 × EG4 6000XP all-in-one inverter\u003c\/strong\u003e — 6,000W continuous split-phase 120\/240V output, dual MPPT charge controllers with up to 8,000W of PV input, and built-in AC charging\u003c\/li\u003e\n\u003cli\u003eClosed-loop communication between battery and inverter for accurate state-of-charge reporting and coordinated charging\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIs this the right size for you?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIt fits if:\u003c\/strong\u003e you're powering a cabin, tiny home, RV pad, or small off-grid household — refrigerator, lights, electronics, water pump, and a window AC or similar 240V load. 6,000W continuous output covers most single-family essential loads, and 15 kWh of storage typically carries an efficient small household overnight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSize up if:\u003c\/strong\u003e you plan to run central air conditioning, a well pump plus large appliances simultaneously, or a full-size home. In that case, look at the NEXUS + EG4 12000XP kit, which doubles the inverter capacity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlternative:\u003c\/strong\u003e if you prefer BigBattery's own inverter line, the NEXUS + APEX 6.5K kit offers a similar power class with the APEX all-in-one unit.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003eBigBattery NEXUS, 48V LiFePO4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnergy storage\u003c\/td\u003e\n\u003ctd\u003e15 kWh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery chemistry\u003c\/td\u003e\n\u003ctd\u003eLithium iron phosphate (LiFePO4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInverter\u003c\/td\u003e\n\u003ctd\u003eEG4 6000XP all-in-one\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContinuous output\u003c\/td\u003e\n\u003ctd\u003e6,000W, split-phase 120\/240V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSolar (PV) input\u003c\/td\u003e\n\u003ctd\u003eUp to 8,000W via dual MPPT controllers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem voltage\u003c\/td\u003e\n\u003ctd\u003e48V nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication\u003c\/td\u003e\n\u003ctd\u003eClosed-loop battery-to-inverter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExpandable\u003c\/td\u003e\n\u003ctd\u003eYes — additional NEXUS batteries can be added in parallel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWarranty \u0026amp; support\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBattery:\u003c\/strong\u003e the NEXUS is covered by BigBattery's 12-year manufacturer warranty, backed by lifetime USA-based technical support. \u003cstrong\u003eInverter:\u003c\/strong\u003e the EG4 6000XP carries a 5-year full parts-or-product replacement manufacturer warranty; EG4 requires warranty registration within the first year of purchase (or proof of purchase from an authorized distributor) to keep coverage valid.\u003c\/p\u003e\n\n\u003ch2\u003eCommon questions\u003c\/h2\u003e\n\u003ch3\u003eDo I need an electrician to install this?\u003c\/h3\u003e\n\u003cp\u003eThe battery and inverter connect to each other with supplied DC cabling, but the AC side — wiring the inverter output to your breaker panel — should be performed by a licensed electrician to meet local code.\u003c\/p\u003e\n\u003ch3\u003eAre solar panels included?\u003c\/h3\u003e\n\u003cp\u003eNo. This kit is the storage and inverter core of the system. The 6000XP accepts up to 8,000W of solar panels, which are sold separately so you can match your roof or ground-mount layout.\u003c\/p\u003e\n\u003ch3\u003eHow does LiFePO4 handle cold weather?\u003c\/h3\u003e\n\u003cp\u003eLiFePO4 batteries discharge reliably in freezing temperatures, but charging below freezing is restricted by the BMS to protect the cells. Installing the battery in an insulated or conditioned space keeps charging available year-round.\u003c\/p\u003e\n\u003ch3\u003eCan I add more storage later?\u003c\/h3\u003e\n\u003cp\u003eYes. Additional NEXUS batteries can be paralleled onto the same 48V bus, so you can start with 15 kWh and grow the bank as your loads increase.\u003c\/p\u003e","brand":"BigBattery","offers":[{"title":"1 × NEXUS — 15 kWh","offer_id":49148866003099,"sku":"K0152","price":4544.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/0614\/9787\/files\/EG4-6000XP-NEXUS-1-1.webp?v=1785535602","url":"https:\/\/offgridhorizon.com\/products\/bigbattery-nexus-eg4-6000xp-off-grid-kit-15-kwh-48v-lifepo4","provider":"OffGrid Horizon","version":"1.0","type":"link"}